Cargo snugger strap and hook mechanism

ABSTRACT

An anchor with an “L” shaped aperture receives a strap pin end, the lower leg of the “L” locking the pin in place, the strap bearing on a smoothly curved side wall, the pin being held in place when not under load by a clip member on the back of the anchor and being contained within a pocket in the wall of a railroad box freight car. A two part strap is shortened to fit the cargo load through the use of a combination of turns and bights around a three part clip having a generally oval ring with an upstanding half oval ring portion displacing the various parts of the strap threaded thereon to increase friction. Moreover, the anchor may include a slot which with a side edge of the “L” shaped aperture defines a restraining post-like member therebetween. The restraining strap can be then threaded into and through the slot, around the post-like member, and exit the aperture so as to form a loop about the post-like member for restraining movement of the strap.

REFERENCE TO RELATED APPLICATIONS

This application is a continuation-in-part of Ser. No. 10/092,099 filed Mar. 6, 2002 now U.S. Pat. No. 6,767,169 which is a divisional of Ser. No. 09/459,545 filed Dec. 13, 1999 now U.S. Pat. No. 6,422,794 issued Jul. 23, 2002.

BACKGROUND OF THE INVENTION

Loads on rail cars need to be restrained from shifting under the various loads imposed by draft, buff, and rocking of the car. For particular types of loads, such as large rolls or coils of sheet material, or palletized loads, tensioning mechanisms using straps and anchors are advantageous. A special anchor fitting adapted to receive a corresponding anchor pin combines with a strap length controlling mechanism midway from the ends of a strap to maximize strength, ease of operation, economy in manufacture and minimize damage to rolls, coils or palletized cargo. A simple cam locking mechanism may be used instead of the prior art metal ratchet mechanism on a strap.

The invention was initially adapted to shipment of paper rolls and other rolls of material easily damaged by prior art rail car wall anchors. Other cargos can be secured to advantages, particularly palletized cargo such as shrink wrapped, packaged juices, or other similarly vulnerable cargo that should be protected from contact with in-car projections during loading, transporting and unloading. Further, appropriately sized snugger straps and hooks could even be used for other materials. In other uses, other transportation devices such as over the road trailers and shipping containers continue to utilize maximum cubic volume (“high cube”) designs the ability to recess anchors also has added utility.

SUMMARY OF THE INVENTION

The invention combines several distinct elements into an improved cargo snugger strap and hook mechanism. An anchor has an “L” shaped aperture which A strap shortening device enables a two part strap to be shortened to fit the cargo load through the use of a combination of turns and bights around a three part clip having a generally oval ring with an upstanding half oval ring portion displacing the various parts of the strap threaded thereon to increase friction to the point where the strap length can be effectively fixed under load, yet the length varied when not under load.

In addition the anchor includes an integral elongated strap receiving and retaining post-like member that is defined by a side portion of the “L” shaped aperture and by a slot in the anchor spaced from but near the side portion and generally parallel to the side portion. Thus, the post-like member is defined by and positioned between the aperture side portion and the slot. A spring-like clip mounted to the back of the anchor is positioned to press a strap surrounding the restraining post-like member against the back of the restraining post-like member and resist unwanted withdrawal movement. The strap includes a body portion and a strap end that is threaded into the slot, around the back of the post-like member and out the “L” shaped aperture adjacent the side portion. After exiting the anchor, the strap end can be buckled or otherwise secured to the strap body so as to surround or encircle the post-like member. Force on the strap body, due to lading movement, pulls against the post-like member. Unthreading or withdrawal is minimized by the clip urging the strap against the post and by the clip grasping the strap and exerting a reactive force thereon to resist withdrawal.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an elevational view of my cargo snugger strap;

FIG. 2 is a plan view of my cargo snugger strap;

FIG. 3 is a an elevational view of my cargo snugger strap in an adjusted condition;

FIG. 4 is a plan view of my cargo snugger strap in an adjusted condition;

FIG. 5 is an enlargement of the adjustment mechanism;

FIG. 6 is an elevational view of the anchor plate;

FIG. 7 is a sectional view of the anchor plate;

FIG. 8 is a plan view of the strap and anchor during the step of aligning the pin with the anchor;

FIG. 9 is an elevational view of the strap and anchor during the step of aligning the pin with the anchor;

FIG. 10 is a plan view of the strap and anchor during the step of inserting the pin in the anchor;

FIG. 11 is an elevational view of the strap and anchor during the step of inserting the pin in the anchor;

FIG. 12 is a plan view of the strap and anchor during the step of moving the pin inwardly past the locking angle of the anchor;

FIG. 13 is an elevational view of the strap and anchor during the step of moving the pin inwardly past the locking angle of the anchor;

FIG. 14 is a plan view of the strap and anchor during the step of moving the pin forwardly past the locking angle of the anchor;

FIG. 15 is an elevational view of the strap and anchor during the step of moving the pin forwardly past the locking angle of the anchor;

FIG. 16 is a plan view of the strap and anchor during the step of engaging the pin with the locking angle of the anchor;

FIG. 17 is an elevational view of the strap and anchor during the step of engaging the pin with the locking angle of the anchor;

FIG. 18 is a perspective view of a preferred strap eye anchor with a choker strap;

FIG. 19 is a perspective view of a strap eye anchor with a strap toggle;

FIG. 20 is a perspective view of a toggle pin, strap and lanyard;

FIG. 21 is a top plan view of a hook;

FIG. 22 is a top plan view of a hook;

FIG. 23 is an elevational view of a hook;

FIG. 24 is an elevational view of a rod anchor in a wall pocket;

FIG. 25 is an elevational view of the anchor with the restraining post-like member;

FIG. 26 is a sectional view of the anchor of FIG. 25 taken along line 26—26; and

FIG. 27 is a sectional view like FIG. 26 with a strap surrounding or encircling the post-like member.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

An improved wall anchor 10 is adapted for use in connection with a paper load snugger strap 12 for use in a transport vehicle such as a railroad freight box car. The wall anchor 10 includes a locking angle or clip member 14 recessed in a recess 16 in anchor 10 and also within car wall 18. In operation strap pin 20 will be inserted into the wall anchor 10 and manipulated into a secure position maintained by locking angle or clip member 14 which defines a recess 16 which captures an end of pin 20. After the strap 12 is tensioned, the strap pin 20 will be bear on anchor 10 itself firmly affixed to wall 18, there being a hollow, pocket or recess in the side of the car behind wall 18. The major advantage of this system is that under all circumstances there will be no object projecting inwardly into the cargo area of the car from the side wall 18 of the car to damage the cargo. This is particularly advantageous with easily damaged, but otherwise unpacked or uncrated cargo such as is the case with paper rolls or palletized, plastic wrapped cargo.

The anchor 10 and strap pin 20 work most advantageously with a strap-shortening device, generally designated 22, for cargo load snugger 12. The strap-shortening device 22 includes a specially designed clip 24. Clip 24 is preferably made from ⅝″ dia. heat treated alloy steel. Steel ring 26 is similarly constructed of similar materials and dimensions. The clip 24 and ring 26 are thus capable to handle a minimum of 21,000 lbs. pulling force.

The shortening device 22 is formed and arranged as described below from two (2) pieces of preferably 4″ polyester strap webs the pin side web 28 and the standing web 30 which are interconnected using clip 24 and ring 26. The term web is used in the general sense of describing a length of generally flat material, and is not necessarily limited to woven fibrous material, although such material is preferred. The concept can be applied to different sized straps or straps of different strength properties depends on the loads to be borne. Webs 28, 30 are specially routed through clip 24 and ring 26. The pin side web 28 is sewn to ring 26 at the end opposite strap pin 20. The standing web 30 passes through the various segments of clip 24 through a plurality of overlapping turns and bights that apply sufficient friction under load that the cargo is maintained in position in the rail car. Standing web 30 has working end 32 which is the end that passes though clip 24, while has standing end 34 is opposite. Standing end 34 is attached to a known tensioning device 36, typically a device with a ratchet or an over center cam arrangement to put final tension on strap 12 to bind the load, once excess length has been taken up by shortening device 22.

By feeding and pulling end 32 of web 30 through clip 24, the overall length of the strap 12 can be adjusted. The ratio of the adjustable length is almost 2:1 between the clip 24 and the steel ring 26. In other words, if a maximum 12′ long strap system combined with that 6′ long fixed strap from the wall anchor to steel ring and that a maximum 6′ long adjustable strap between the clip and the steel ring, the system can be shortened to any length between 12′ and 9′ by using this device.

Clip 24 is formed so as to have a generally oval ring portion 40 and an upstanding half-oval portion 42. Each portion includes straight legs 44, 46, 48 integrally formed as part of their oval shapes. These legs provide a clear path for the webs with even distribution of loads and even application of friction. It will be seen that beginning from end 34 of web 30, end 32 will pass over the various legs 44, 46, 48 of clip 24 being threaded to the final form. Web 30, thus forms first turn 50 around leg 44, passes upwardly to leg 48 to form second turn 52, loosely held to enable subsequent threading. Web 30 then passes downwardly to leg 46 forming third turn 54. Web 30 then exits clip 24 and forms first bight 56 leading generally downwardly around a leg portion 58 of ring 26. Web 30 then passes back to clip 24, specifically forming fourth turn 60 around leg 46 and outward (below in FIG. 5) of third turn 54, but leaving a gap therebetween. Next, web 30 passes upwardly and around leg 48 to form second bight 62. This passes under turn 52 and will therefore be sandwiched between turn 52 and leg 48 when under load. End 32 then passes between turn 54 and turn 60, forming fifth turn 64. Turn 64 will also be sandwiched under load, between turns 54 and 60 and under leg 46. In this manner, web 30 can be easily threaded manually and easily adjusted when no load is placed on the strap 12. However the multiple turns and bights, and the sandwiching action in two turns, greatly increases the friction in the system when under load, thereby providing secure fastening of cargo. The turns, as shown in FIGS. 4 and 5, are generally between from about 35 degrees to about 130 degrees. The bights, as shown in FIGS. 4 and 5, are generally greater than 180 degrees.

FIGS. 8-17 illustrate the way pin strap 20 is anchored in anchor 10 through movement in three dimensions. Anchor 10 uses a plate or fitting 70 formed with bottom 72, top 74 and two side 76, 78 interior walls which define an aperture 80. The term plate is used for convenience and not by way of limitation to a particular method of fabricating, thus, cut and formed steel plate could be used, as could appropriate forgings, castings or moldings of appropriate material. Top wall 74 is formed to have recessed portion 82 which defines a notch 84 or enlarged portion of aperture 80. Side wall 78 is further formed so as to have a smoothly curved surface 86 to relieve stress on web 28 when under load.

As strap pin end 90 approaches aperture 80 because the length of pin 20 is greater than the distance from wall recess 82 to bottom wall 72, pin 20 will be tilted slightly to insert the lower pin end 92. As the width of the sewn end 90 is less than the width of the body of web 28, end 90 fits closely between the smaller dimension between wall 74 and wall 72. Thus, aperture 80 is generally of an “L” shape, the bottom leg of the “L” corresponding to the width of end 90, and the height of the “L” shape corresponding to slightly more than the width of end 90 plus the exposed top end 94 of pin 20.

FIGS. 10-17 show the progression of inserting pin 20 behind plate 70 and its movement around angle or clip member 14 until, as shown in FIGS. 16 and 17, it is in its final anchored position. It will be noted that strap 28 at end 92 bears on curved surface 86 in FIG. 17. Thus, the load across strap 12 is borne on anchor 10 when tensioned, while pin 20 is held in place when strap is untensioned, by angle or clip member 14. While in the preferred embodiment, a weldment of a right angle section steel member is utilized, other clip member configurations could be used to perform this function.

The anchor 10 in combination with strap shortening device 22 further enables elimination of the contact between the prior art metal ratchet (analogous to tensioning device 36) and the cargo loads such as paper loads or palletized cargo requiring surface protection. This prior art contact creates restrictions in the utility of prior art load snugger systems because of the damage to the cargo loads. The invention also could offers a better ratchet operating position for dock workers because of the improved location of tensioning device 36 relative to the ends of the strap 12.

Alternative anchor attachments are shown in FIGS. 18-20. A strap eye 110 having center bail 112 and ends 114, 116, is mounted on a car wall 118. This can be easily accomplished by welding, preferred in the current field environment, or alternative attachments could be used, as by heavy duty bolts or rivets through ends 114, 116. A sufficiently wide footprint, using the ends 114, 116 and bail 112 as shown, enables the use of a “choker” arrangement where a strap 120 has a loop 122 such that the standing part 124 is passed through the loop for a tight, fastener-free connection to the eye 110. If a car is fitted with a recessed pocket, the function of bail 112 could be performed by a bar 134 spanning the pocket 136.

In another alternative, loop 122 is passed through eye 110, particularly where the standing part is fixed or it is inconvenient to set the choker arrangement, and pin 130 is inserted into loop 122, strap 120 being drawn in tension, such that a toggle connection is formed. In this arrangement, toggle pin 130 can be removed by hand upon slacking of strap 120. Lanyard 132 can be used to maintain pin 130 from being lost.

FIGS. 21-23 show an improved strap hook 150 that may be fastened to a looped end 152 of a strap 154. Preferably end 152 is stitched 156, however buckle arrangements known in the art or described above could perform a loop forming function. Stitching has advantages in durability and avoidance of misadjustment and slipping, particularly when at a bitter end of a strap 154.

Strap hook 150 is made up of inner plate 160 and an overlapping outer plate 162 having respective curves 164, 166. Opposite curves 164, 166 are slotted portion 168, 170. Plates 160, 162 are also joined by a loosely fit rivet 172. It will be seen that the flexibility of end 152, slotted portions 168, 170, and rivet 172, hook 150 opens to fit an appropriate pin 174 such as may be located on a strap shortening device 22 or anchor pocket bar 134, 136 (FIG. 24).

Turning now to FIGS. 25-27, the anchor 200 is similar to the anchor structures described hereinbefore in that the anchor includes a body portion 202 which defines an “L” shaped pin receiving aperture 204 and a pin engaging clip 206. However, in addition, the body portion 202 defines a strap or web receiving aperture 207 which in combination with the adjacent pin receiving slot or aperture edge 208 defines a post-like structure 210. A strap or web is trained about the post-like structure 210 so as to surround the “post-like” structure and restrain loads acting against the strap. The system is particularly useful where the web or strap end is free and does not include a restraining pin. In FIG. 27 the strap end 212 is shown threaded through the slot or aperture 207 about the post-like structure 210 and then exits the anchor 200 via the aperture 204 against the edge 208.

A strap restraining clip 213 is secured (such as by welding) to the back of the anchor body 202 extends across aperture 207 and spaced from but is biased toward the back of the post-like structure 210.

The clip 213 engages the strap and urges it into engagement with the post. Moreover, the clip edge 213A grips the strap so as to resist movement of the strap in the reverse direction. Such reverse or withdrawal movement of the strap relative to the restraining post is minimized by the urging and engaging action of the clip.

Moreover, the strap end can be secured to a buckle, such as 214, that is mounted on the strap body and which receives and holds the strap end to the strap body. The action of the buckle further minimizes the chance of withdrawal of the strap from the anchor. It is seen that the aperture 207 is defined by portions of the anchor and of the retaining post. The anchor side of the aperture has an angularly positioned front entry surface 207A and a generally perpendicular rear or exit surface 207B. The other side of the aperture 207 is defined by the restraining post. The post includes a perpendicularly positioned front or entry surface 207C and angularly positioned rear or exit surface 207D. It is seen that a restriction is formed by the intersections of (a) surfaces 207A and 207B and (b) surfaces 207C and 207D. The surfaces define (1) an enlarged front opening that is angularly positioned away from the “L” shaped aperture 204 and (2) an enlarged rear opening that is angularly positioned toward the “L” shaped aperture. The orientation of the opening 207 and side surfaces operates to position the strap in the slot opening at an angle to the anchor body, in a position to grasp the strap through the “L” shaped aperture 204 and in a position to be drawn around the restraining post 210. The edge 208 includes 3 surfaces, (1) an angularly positioned rear surface 208A (2) a flat or right angle center surface 208B, and (3) an oppositely inclined and angularly positioned front surface 208C. These surfaces are oriented so as to permit the strap to wrap around the post 210 and be joined to the buckle 214 without engaging any sharp edges which may cut into or on which the strap may hang up.

Thus, the use of the restraining post portion of the anchor permits the anchor to be used with a strap that does not include a pin end, permits the anchor to resist forces on the strap as from lading during movement, and provides a mechanism for storing or hanging a pin free strap from the anchor. This anchor thus provides in combination a structure for securement of the strap with a pin end or a strap which does not include a pin end. 

We claim:
 1. A multipurpose anchor for mounting to a wall of a transport vehicle and for receiving and providing an anchor for an elongated lading engaging and anchoring strap, wherein the anchor includes: a body which defines an “L” shaped aperture adapted to receive a strap with an anchor pin at an end and which also defines an elongated strap receiving slot adjacent the “L” shaped aperture for receiving a strap with a pin free end, said anchor body including a strap restraining post-like member between the “L” shaped aperture and the slot and about which a strap can be trained, a pin receiving clip mounted to the anchor body adjacent the “L” aperture for receiving at least a portion of the pin and restraining movement of an anchor pin which has been fitted through the aperture to the clip, and a strap restraining clip mounted to the anchor body and positioned (1) to engage the strap and urge the strap against the restraining post-like member and (2) to permit the entry of a strap into the slot and resist movement of the strap out from the slot.
 2. A multi-purpose anchor as in claim 1 wherein the slot is generally parallel to an edge of the “L” shaped aperture so as to define therebetween the restraining post-like member.
 3. A multi-purpose anchor as in claim 2 wherein the slot is angularly structured so that the front of the slot is positioned away from “L” shaped aperture and the rear of the slot is positioned toward the “L” shaped aperture.
 4. A multi-purpose anchor as in claim 3 wherein the surfaces which form the slot and post-like member are free of edges which may cut into the strap.
 5. A multi-purpose anchor as in claim 1 wherein the strap restraining clip is secured to the back of the anchor body and is constructed to press a strap against the back of the restraining post-like member and the strap restraining clip includes an edge adapted to grippingly engage the strap.
 6. A multi-purpose anchor as in claim 3 wherein said strap restraining clip is biased toward said post-like member.
 7. A multi-purpose anchor as in claim 3 wherein said strap restraining clip is mounted on one side of said slot, extends across said slot, and terminates on another end of said slot where it is biased toward the post-like member. 